Alright so I'm trying to write up a plausible plan that Solas might have to tear the veil down for my next fic. I wanted to run a theory through here to see if it was plausible or too crazy.
Is it possible Solas could be having the artifacts activated because they will somehow allow him to tear the veil down in some places but leave it up in others? The reason he might want to do this is so that the areas were the Evanuris are sealed will stay separated while the rest is torn down. I just can't see Solas going through all that work to seal them only to tear it all down knowing that they will probably continue to be generally awful beings. Also why would he go through all the trouble with the artifacts? I mean yeah it could just be some random errand quest BioWare threw in but from a story stand point he must have a reason yes?
Does Solas actually say that he wants to free the Evanuris anywhere? I got the impression that he wants to tear down the Veil
without freeing the Evanuris. I think that Evanuris are sealed not only behind the Veil but also with use of Eluvians (in those "inbetween places) so tearing down the Veil won't free them. Maybe it'll make their escape more possible, especially with the ongoing resurrection of the Eluvian Network.
If they were pretty awful when he sealed them up there's no way they would be any better after millennia of confinement. It doesn't make sense, right? I don't think Solas would be that irresponsible. Anyway, the world might need to reconnect to the Fade but I don't see why the hell would it need the Evanuris.
So, the artifacts. I'm not firmly in clan they-don't-strenghten-the-Veil-they-weaken-it but I think the artifacts may serve more than one purpose. For some reason I believe Solas when he says the Veil is stronger after I activate it. If he were lying spirits/demons would've swarmed those areas, maybe even couple more rifts popped up. But at the same time I
do think that the artifacts will help him tear down the Veil.
How to combine those, you say? I think the artifacts are kind of a hook or a probe in the Veil. But they are not fully autonomous, they are linked directly to Solas. When he installed them he put them into "strengthen mode" so when Inqui activates them they really do measure and strengthen the Veil. But the moment Solas would be ready, he'll push a metaphorical Big Red Button in his head and all those pretty globes switch into the "tear that **** down" mode.
I'm not sure the Veil can be brought down in patches? On one hand, Solas always says things like "the Veil is thin here" but I don't think we actually got any concrete evidence that thin=young, thick=old theory is true, did we? On the other hand, I always got the impression that you can't tear down the Veil in some places and keep it in the others. I mean, how would that work? Wouldn't the Fade just seep through the Veil-free patches just going around the Veil that is left? Furthermore, Solas says that it's not much of a physical barrier, that is just an oversimplification used by the Chantry. So you probably can't just cut some parts out and leave others.